1 //===-- NumberedValues.h - --------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_ASMPARSER_NUMBEREDVALUES_H 10 #define LLVM_ASMPARSER_NUMBEREDVALUES_H 11 12 #include "llvm/ADT/DenseMap.h" 13 14 namespace llvm { 15 16 /// Mapping from value ID to value, which also remembers what the next unused 17 /// ID is. 18 template <class T> class NumberedValues { 19 DenseMap<unsigned, T> Vals; 20 unsigned NextUnusedID = 0; 21 22 public: 23 unsigned getNext() const { return NextUnusedID; } 24 T get(unsigned ID) const { return Vals.lookup(ID); } 25 void add(unsigned ID, T V) { 26 assert(ID >= NextUnusedID && "Invalid value ID"); 27 Vals.insert({ID, V}); 28 NextUnusedID = ID + 1; 29 } 30 }; 31 32 } // end namespace llvm 33 34 #endif 35